6R + r - 5r simplify each expression

There is a sting of red lights strung around a window. The red lights blink ever 3 seconds and the blue lights blink every 5 seconds. How many times will they blink at the same time?

The length of a rectangle is twice its width. if the area of the rectangle is 200 yd2, find its perimeter.

How many distinct triangles can be formed for which m∠E = 64°, g = 9, and e = 10?

65 million plus 4000

A hockey puck strikes a wall at an angle of 30 degrees. The puck then travels away from the wall at the same angle.

A pair of socks costs $5.00. A package of 3 pairs costs $12.00. How much would you save if you buy 2 packages instead of 6 individual pairs?

A right triangle ABC is shown below: A right triangle ABC with height AB labeled 3 units and base BC labeled 5 units is shown. The area of the triangle above will equal one half of a rectangle that is 5 units long and __ units wide.

Peter has only quarters and dimes in his coin collection. If he has three times as many quarters as dimes, which is an expression for the number of quarters he has in terms of the number of dimes?

An airplane traveled 11,760 miles in 21 hours. On average, how many miles per hour did it fly?

Multiply. (x - 6) (5x - 4)